This second installment in the “You don’t know HTML” series is going to be all about the ways that we put collections of things together. We’re skipping over the MDN and W3Schools introductory pages and instead we’re going into the kind of stuff you discover after accidentally taking your cousin’s Ritalin right before you open up the W3C specs. Let’s dive deep into lists.

Modern CSS code snippets, side by side with the old hacks they replace. Every technique you still Google has a clean, native replacement now.

The box-decoration-break CSS property specifies how an element's fragments should be rendered when broken across multiple lines, columns, or pages.

Not the biggest problem in the world, but it's annoying when you're trying to use borders around words or phrases in paragraphs of text and the result looks like crap because of line breaks. Glad to know there's a simple solution.

I randomly learned this trick today from a newsletter by Victor Ponamariov so thanks for that!

Here’s how I made sense of responsive image content, progressing from simpler to more complicated — and then back to simple.

A tree view (collapsible list) can be created using only HTML and CSS, without the need for JavaScript. Accessibility software will see the tree view as lists nested inside disclosure widgets, and the standard keyboard interaction is supported automatically.

h-feed is a simple, open format for publishing a stream or feed of h-entry posts, like complete posts on a home page or archive pages, or summaries or other brief lists of posts. h-feed is one of several open microformat draft standards suitable for embedding data in HTML.

Gradient Magic is the largest gallery of CSS Gradients on the web, with new and exciting gradients added every day.

CSS Gradients are fancy patterns created via CSS, primarily used to add color or patterns to a website. They have many benefits over images, including being easier to work with and much smaller in size.

CSS Grids have been around a long time. Often they come bundled in frameworks such as Bootstrap. I'm not a Bootstrap hater, but sometimes using a framework is overkill if all you really need is a grid. Here's how to make your own CSS Grids from scratch.

Centering in CSS is a pain in the ass. There seems to be a gazillion ways to do it, depending on a variety of factors. This consolidates them and gives you the code you need for each situation.

Let’s harness the power of these new media queries to serve an image of the right size based on the device a user views our site on. We’re going to save a lot of bandwidth for the small devices, and serve a beautiful large image for larger ones.

We’ll do that by using the HTML5 picture element and its powerful source tag and media and srcset attributes.